The point is a few hundred games is more than enough to understand high level allied play. My USF and SU ranks at a few points in time were higher than my Ost rank despite having a lot less experience with them. USF especially is easy mode. Almost never punished for mistakes as USF.
He is right though.
I'm not saying this to bash your claim, everybody is entitled to an opinion, but seeing how you are angry about SOV all the time, my suggestion, is that you do play them for a while at least, and come back.
I gurantee your views will change once you start playing with other factions.
As for overnerfing/overbuffing, the balance team already said that the way they work is primarly to make radical changes then adjust it accordingly after the community has tested the new patch.
The brumbar was not overnerfed though, it's been adjusted in relation with the 2v2 stats, this unit was overperforming because of its armor.